terminology: Fix evas event callback

Summary:
_cb_del was causing a compiler warning about incorrect function
parameters...basically the function was not declared to match an
evas_event_callback. This patch fixes that issue

@fix

Reviewers: billiob

Reviewed By: billiob

Differential Revision: https://phab.enlightenment.org/D6629

src/bin/controls.c

@@ -49,13 +49,15 @@ _cb_sel_off(void *data,
      elm_object_disabled_set(bt_copy, EINA_TRUE);
 }
 
-static Eina_Bool
-_cb_del(void *data)
+static void
+_cb_del(void *data,
+        Evas *_e EINA_UNUSED,
+        Evas_Object *_obj EINA_UNUSED,
+        void *_ev EINA_UNUSED)
 {
    Evas_Object *frame = data;
    evas_object_del(frame);
    elm_cache_all_flush();
-   return EINA_FALSE;
 }
 
 static void